Artificial teeth



Ju l 16, 1929. F. MAULEN ET M. 1.721980 ARTIFICIAL TEETH Filed 'Jan. 16, 1928 INVENTOHS.

MY QM, ATTORNEYS.

l atented July 16, 1929,

UNITED STATES,

PATENT oF'FicE.

' FREDERICK MAULEN, OF EAST ORANGE, NEW JERSEY, AND SIMON MYERSON', OF

BROOKLINE, MASSACHUSETTS, AND GEORGE L. VAN ALLEN, OF NEWARK, NEW JERSEY, ASSIGINORS TO BAKER & CO. INC, A CORPORATION OF NEWJERSEY.

ARTIFICIAL TEETH.

Application filed Januar is, 1928. Serial No.24a9e2.

whereby it will more readily and perfectly pierce the backing plateso as to form a tight and close engagement with the edges of the opening which it makes therein; to provide for this purpose a pin having a longitudinal sharp knife-like margin which will cut 1138 way through the backing plate; to provide such a pin with outwardly rounded sides; to

, ,provide a pin with opposite sharp cutting margins and opposite rounding sides, and to obtain other advantages and results as maybe brought out by the following descriptlon.

Referring to the accompanying draw ngs,

.in which like characters of reference indicate the same parts throughout the several views, and in which Figure 1 is on amuch enlarged scale and the rest of the views still further enlarged, inorder to show the minute pin more clearly, I I

Figure 1 is a perspective View of a toothfacing having pins of the preferred form of our improved construction;

Figure 2 is a side view of one of said plns;

Figure 3 is a cross-section of the same on line 33 of Fig. 2;

Figure 4 is a cross-section on line 44 of Fig. 2;

Figure 5 is a view illustrating the penetrating portion of a pin of slightly modified cross-section;

Figure 6 is a view similar to Fig. 3 illustrating another modification of cross-sect1on;

Figure 7 shows in side view a pm with the cross-section of Fig. 6, and

Figure 8 is a cross-section, similar to Fig. 3, of a further modification.

In the specific embodiment of the invention shown in Figures 14 inclusive, the pin is shown having an upset or headed end 1 adapted to be baked in a tooth-facing 2, and a shank 3 the outer or penetrating portion 4 of which is adapted to project from the tooth facing to pass through a backing plate (not shown). The shank 3 is shown as tapering, at least for its said penetrating portion 4 which extends from its point 5 to the surface Got the facing, so that said penetrating portion 4 of the pin will crowd its way through the backing plate with a constantly increasing cross-section and thus fit tightly against the edges of the aperture which it makes, when the backing plate lies close against the surface 6 of the-tooth-facing, as is set forth in Patent No. 1,429,748 of September 19, 1922. Obviously the rest of the shank, or portion 7, which is embedded in the toothfacing 2, may be tapered or not, as desired.

In carrying out our invention as shown in Figures 1-4 inclusive, we form the penetrating portion 40f the pin into a blade which in use is positioned in a plane longitudinally of the tooth-facing or in the direction of strain, the blade being preferably thickest along its axial center line in a plane transverse toits said plane of positioning and tapering both ways with lateral margins 8, 8, which are sharp and knife-like so as to cut their way through the backing plate. The effect of this construction is that as the pin is forced through the backing plate it cuts the same cleanly at the opposite margins of the blade,

and the sides 9, 9 of the blade force or roll the backing away, keeping close contact with it. I-Ieretofore, without such cutting margins upon the" penetrating portion of a tapered facing pin, it sometimes happened that the crowding action of the tapered pin upon the backing plate caused tearing or rupture of the backing plate at some point around the circumference of the pin, but by our invention the cutting margins prevent any tearing thereat and separate the circumference into parts or arcs along which the crowding pres sure of inserting the blade into the backing distributes itself equally or nearly so.

Obviously, while we have shown in Figures 1-4, inclusive, two cutting margins 8, 8, one cutting margin 10 could be employed, and the opposite part 11 of the blade made thick and rounded, as shown in Figure 5, with some of the beneficial effects of our invention. In this case the point 12 of the blade would be at the end of the thick rounded part 11, as shown, and said thick rounded part would serve to determine the position of the backing plate in Figures 1-4, inclusive.

on the tooth. The thick rounded part 11 would be preferably toward the incisal edge of the tooth, in baking the pin in a facing.

Also, the sides of the blade, instead of being rounded as at 9, 9 in Figures 1% and as in Figure 5, could be angular with flat faces. This construction is illustrated in Figures 6 and 7 of the drawing, where the blade of the pin is shown diamond-shaped in cross-section, with opposite cutting margins 13, 13 and intermediate angles 14, 14 along the middles of its opposite sides where the blade is thickest, giving flat faces 15, 15.

Under some conditions, the sides 16, 16 of p the blade might become flat, with sharp cutting margins 17, 17, as in Figure 8, but we prefer to have the blade taper in thickness from the longitudinal median lines of its sides to the sharp cutting margins, and preferably this is done by rounding the sides 9, as shown This gives a rounded point 5, whereas the constructions of Figures 6, 7 and 8 obviously make the point of the pin acute and more difficult to produce accurately. Variation in such details, and other modifications, in securing the results and advantages of our invention, may be made by those skilled in the art, without departing from the spirit and scope of our invention, and we do not wish to be understood as limiting ourselves except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what we claim is:

1. A facing pinfor artificial teeth, comprising an anchoring portion and a penetrating blade having asharp cutting margin.

2. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having opposite sharp cutting margins.

3. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having a sharp cutting lateral margin extending substantially the length of said blade.

4. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having opposite sharp cutting margins and tapering in cross-section from its longitudinal middle to said margins.

5. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having a sharp cutting margin, and tapering in crosssection to said margin by outwardly convex opposite sides.

6. A facing pin for artificial teeth, comprising an anchoring portion and a penetrate ing blade having opposite sharp cutting mar gins and outwardly convex sides between said margins.

7 A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having opposite sharp cutting margins and tapering in cross-section from the middles of its outer sides to said margins by outwardly convex surfaces.

8. A facing pin for artificial teeth, comprising an anchoring portion and a tapered penetrating blade with a sharp cutting margm.

9. A facing pin for artificial teeth, comprising an anchoring portion and a tapered penetrating blade with opposite sharp cutting margins.

10. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade having a sharp cutting margin and tapered lengthwise to its outer end.

11. A facing pin for artificial teeth, comprising an anchoring portion and a penetrating blade tapered for substantially its length and having a sharp cutting lateral margin extending for substantially said length.

SIMON MYERSON. FREDERICK MAULEN. GEORGE L. VAN ALLEN. 

